Just look at the rash – then click the box to reveal the diagnosis. That’s it. Nothing fancy.
It’s an Atypical Mycobacterial infection!
These last for awhile and can be seen with those little surround satellite nodules. Often they’ve had an ineffective I&D and been on a course of equally hopeless antibiotics because someone thought it was MRSA. Mycobacterium marinum is the most common species. You get it when you get a wound inoculated with the bug while in a body of water that isn’t your bathtub or pool. These wounds are long landing and granulate. Try to culture it and know that long courses of antibiotics and maybe even surgical incision are needed.